Bump actions/setup-dotnet from 4 to 5 (#1420)

Bumps [actions/setup-dotnet](https://github.com/actions/setup-dotnet) from 4 to 5.
- [Release notes](https://github.com/actions/setup-dotnet/releases)
- [Commits](https://github.com/actions/setup-dotnet/compare/v4...v5)

---
updated-dependencies:
- dependency-name: actions/setup-dotnet
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/discord_discussions.yml

@@ -28,7 +28,7 @@ jobs:
           exit 1
 
       - name: Setup dotnet
-        uses: actions/setup-dotnet@v4
+        uses: actions/setup-dotnet@v5
         with:
           dotnet-version: 8.0.x
           dotnet-quality: ga

.github/workflows/run_linters.yml

@@ -41,7 +41,7 @@ jobs:
           path: tools/icon_cutter/cache
           key: ${{ runner.os }}-cutter-${{ hashFiles('dependencies.sh') }}
       - name: Setup .NET SDK
-        uses: actions/setup-dotnet@v4.2.0
+        uses: actions/setup-dotnet@v5
         with:
           dotnet-version: 9.x
       - name: Install OpenDream

.github/workflows/tgs_test.yml

@@ -59,7 +59,7 @@ jobs:
           - 5000:5000 #Can't use env here for some reason
     steps:
       - name: Setup dotnet
-        uses: actions/setup-dotnet@v4
+        uses: actions/setup-dotnet@v5
         with:
           dotnet-version: 8.0.x